Answer:
Something infront of you but you canโt see it
Despite having long teeth, every bit of food it grabs gets taken from it.
Iโm white perfect for gridding animals use me as a tool
Whatโs brown and sounds like a bell?
Hard iron on horse. Cow's hide on man.
If itโs information you seek, come and see me. If itโs pairs of letters you need, I have consecutively three. What am I?